Valve-cage for gas-engines.



l No.a92,994. 5 PATENTED JULY 14, 1908 E. A. JOHNSTON. l

VALVE' CAGE PON GAS ENGINES, APPLICATION FILED JUNE 8,1907.-

UNITED sTA'rEs APATENT .oFF-ion.'

EDWARD A. lonNs'roN, or STERLING, ILLINOIS, Assi'GNo'R To INTERNATIONAL HARVESTER COMPANY, A- coRPoaA'rloN OF N Ew JEasEY.

VALVE-onori:v non" eAsNeiNEs.

Specication of Letters-'Patent l I Patented Juiy i4, ioos.

Attualita site :uns aiao'il serial No. sust?.

To all whom' 'itmay concern: .Be it known that I, EDWARD A. JOHNSTON,

a citizen ofthe United States, residing at.. Sterling, in the county of Whiteside and.

State of Illinois, have invented certain'v new and useful Improvements 'in Valve-Cages for GasfEngines, f .which the folloWing'is-a.

specilication.

My invention .relates to gas engines in general, and particularly to the manner ofi'nounting the intake and exhaust valves in connection therewith, and consists in 4a-.removable ca ge adapted to be secured tothe engine cyl# in er and in which the valve proper is mounted ;'th e object of my invention being to` provide a valve cage so constructed as not to e warped or otherwise distorted under theI influence ofthe excessive heat .to which such parts are subj'ectedf such. distortion fre-4 quently impairing the'efficiency of theivalve lby causingits stein to bind in its bearing and the valve to be imperfeetly received by 'its seat. when secured in position, willnot be affected by the heat in-a mannerto subject the securing means to undue or unequal'strai'ns ;which "ob}ects are attained byV the'mechanism illustrated in the accompanying drawing, in which- Y1@ AFigure 1 is a sectional '1an view of the valve cage and a portiono acylinder head with a valve mounted-in the cae'. 1 Fig. 2 is an end view of the cage; and tached side elevation of the saine.` Like reference numerals .designate 4the saine parts throughout the several views.

1 is an end portion of aii'engine cylinder,

and 2 an o'penin therein 'communicating with its interior an havin a pipe 3 `leading therefrom, which in this ilustration represents lthe exhaust channel. 4 is a valve cage received by said openinmi'having `an outer flange portion 5, by wliic Vit may be secured to the wall of the cylinder by'means of bolts 6, and a collar portion' 5* engagiii with the' wall of the opening, 'and itis provi( edwith'a central bore adapted to receive the stem 7 of a mushroon'i'valve'A suitably seated upon the inner end of thecag'e; the'stem being surrounded at its outer end by a coiled spring 81 V operative in a common way'to retain'tlie valve in engagement with its seat; and 9 represents a valve lever which is preferably pivoted between outwardly proyecting ears 10 Also-to provide a. valve cage that,

ig. 3 is a d el integral withthe flange 5, by means 'of a pivot'pin 1 1. The cage is pering conical core- 12, having radially projecting ribs 13 extending. outward therefrom vand forming lon itudinal channels -thcreoii that register at t eir inner ends'with longitudinal openingsin a collar portion 14, havinv the valve seat at its inner 0nd and prorovided with an' iiiwardlv ta- P vi edwith a shoulder- 15 on its periphery that engages with a corresponding shoulder iii the opening 2. The longitudinal openings 16 are 1n' communication'with tho interior' of the-cylnder when the valve is lifted from .its seat, and they also communicate `with the exhaust pi e leading from the annular champarts aresubjccted, will expandquently any imperfect seating of the valve proponer' any uneven strainupon the secur- 1 g bolts. latterevil, there'are provided narrow parallel As a further preventive of thechordal channels 17 at the base of the conical core adjacent to the flange portion 5, that ex- Itend inward from the openings inv the flange for the securing boltsin la manner to lessen the resistance of the cage to yielding under strain at that point.4l f

What I claim as my to secure by Letters at/ent, is:

.the bodyof said ca e and. havingfperiphera bearing collars at t e inner and outer ends there'o 'adapted to engage withthe wall of 1. A valve cage for explosive .engines hav, ing, mcombma'tion, a central 'coreformin invention,- and desire an openin communicating with a .combustion chain er, a lange at the outer end of the cage whereby it maybe secured tothe engine, a valve .seat at its op osite end, an axial ore .through said corea apted to receive a valve stem, the inner collar having longitud-inal openin s therethrough between the valve seat an core and the outer collar having parallel chordal channels therein adjacent 2. A-valve cage for explosive engines having,in combination.,'a central 'conical care forming the body of said cage and having pei 'ri-iherel collars at the base and apex thereof idx apted to engagewith the wall of an opening communicating With a, combustion ehembr, a flan e surrounding the collar at the base end osaid core whereby the cage may be secured to the engine, and a valve seat at its oppositend, anaxial bore through said f core adapted to receive a valve stem, the collar at the apex of said core having longitudinai openin s therethrough between the 10 valve seat an core and radial ribs extending lengthwise of said core and forminglongitu dinal channelsthereon that register with said 

